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A snow maker at a resort pumps 140 kilogram of lake water per minute and sprays it into the air above a ski run. The water droplets freeze in the air and fall to the ground, forming a layer of snow. If all of the water pumped into the air turns to snow, and the snow cools to the ambient air temperature of -8.2°C, find how much heat does snow making process release each minute? Suppose the temperature of the lake water is 11.6°C, and use 2.00 x 103 J/(kgoC) for the specific heat capacity of snow.
A 2.0 kg cart has a spring with k = 5000 N/m attached to its front, parallel to the ground. What is the speed of each cart after the collision
Determine the number of moles of helium in the balloon and Determine the mass of helium needed to inflate the balloon to these values
To test the quality of a tennis ball, you drop it onto the floor from a height of 4.26 m. what is its average acceleration during that contact
A charge +7.4 %u03BCC is placed at the center of the hollow spherical conductor with the inner radius 3.2 cm, What is the total charge on the interior
One mole of a ideal gas initially at temp To=0C undergoes an expansion at a constant pressure of 1atm to four times it original volume
a shower head has 20 circulaar openings, each with radiius 1.0 mm. what is its speed as it exits the shower head openings
which of the following represents work: A compressed spring that is allowed to expand. The normal force on a stationary crate. The frictional force on a crate that is being pushed across a flat floor.
a 4.0x10-6 capacitor is charged to 6.0v. it is then connected in series with a 3.0m ohm resistor and connected to a 12v
A conductor suspended by two flexible wires as shown below has a mass per unit length of 0.040 0 kg/m. What current must exist in the conductor in order for the tension in thesupporting wires to be zero when the magnetic field is 3.60 T into the p..
An electron has an initial velocity of 2.00 106 m/s in a uniform 5.00 105 N/C strength electric field. How far does the electron travel before coming to rest
A certain star is 18.6 light-years away. How long would it take a spacecraft traveling 0.950c to reach that star from Earth, as measured by observers?
1. suppose after charging a 4.8 microf capacitor to 8 v you connect it to the second uncharged capacitor of 6 microf.
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